Strong material
A distinctive feature of carbon fiber is its high strength. The tensile strength of this material is as high as over 3500MPa, making it the material of choice in many reinforcement projects. The use of carbon fiber not only significantly improves the structural strength, but also hardly changes the size of the original firmware after construction, nor does it affect the size of the original product. This high strength and dimensional stability make carbon fiber excellent in a variety of applications.
High temperature resistance
Carbon fiber has excellent high temperature resistance properties. It does not melt or soften in non-oxidizing atmospheres up to 3000°C, demonstrating its excellent high-temperature stability. In addition, even in the low temperature environment of liquid nitrogen, the carbon fiber remains soft and will not become brittle. These properties make it an ideal material for manufacturing high-tech equipment such as aerospace and aviation.
Small thermal expansion coefficient
Carbon fiber has a small coefficient of thermal expansion, which allows it to expand and contract to a very limited extent when temperature changes. This low coefficient of thermal expansion gives carbon fiber a high degree of stability, especially in critical applications such as telescopes and other optical machinery. In addition, the thermal conductivity of carbon fiber decreases as the temperature increases, allowing it to withstand sudden cooling and rapid heating, and will not explode even if it drops rapidly from high temperature to normal temperature. Composite materials made of carbon fiber also maintain this stable expansion coefficient and can therefore be used as standard weighing instruments.
Super corrosion resistance
Carbon fiber is extremely corrosion-resistant. This characteristic is mainly due to the chemical stability of carbon element, which allows it to maintain good stability in acid and alkali environments. In addition, carbon fiber is a graphite crystal structure formed by high-temperature graphitization. This physical structure is very stable. Therefore, under the same environment, ordinary steel or aluminum products are prone to rust, but carbon fiber products will not. However, it should be noted that carbon fiber cannot resist the erosion of high concentrations of strong acids and alkalis.
Good electrical conductivity
Carbon fiber has good electrical conductivity properties. At 25°C, the specific resistance of high-modulus carbon fiber is 77Ω·cm, while the specific resistance of high-strength carbon fiber is 1500Ω·cm. This conductive property mainly comes from the carbon fiber itself, while the matrix resin is an insulator. Therefore, CFRP composited with carbon fibers also exhibits anisotropic conductive properties.
High strength and elastic modulus
The strength and elastic modulus of carbon fiber are very high. Its tensile strength can be as high as 3000~4000MPa, which is 4 times higher than steel and 6-7 times higher than aluminum. At the same time, its elastic modulus can also be as high as 600GPa, which is much higher than ordinary materials. This high strength and high elastic modulus make carbon fiber widely used in aviation, military and high-end manufacturing fields.
Good thermal conductivity
The thermal conductivity of carbon fiber is superior and close to that of steel. This property makes it an ideal choice for solar collectors and thermally conductive housing materials that transfer heat evenly. Compared to inorganic and organic materials, carbon fiber has better thermal conductivity due to its unique structure and composition.
Low temperature resistance
Carbon fiber exhibits excellent low-temperature resistance in low-temperature environments. Specifically, even at low temperatures of -180°C, carbon fiber can still maintain its elasticity and will not become brittle. Furthermore, carbon fibers also do not embrittle when exposed to liquid nitrogen temperatures. This characteristic allows carbon fiber to maintain its original performance and structure under extreme low temperature conditions, providing a wide range of applicability for various applications.
radioresistant
Carbon fiber has excellent anti-radiation properties. This characteristic means that when carbon fiber is affected by radioactive substances, it can maintain its original performance and structure and is not easily damaged. This radiation resistance not only gives carbon fiber potential applications in the nuclear industry and medical fields, but also provides guarantee for its use in extreme environments.
light weight
A notable feature of carbon fiber is its light weight. Compared with ordinary steel, the density of carbon fiber is only 1/4 of steel. When manufacturing footwear, carbon fiber can significantly reduce the weight of the shoe. In addition, in automobile manufacturing, lightweighting is a key factor affecting performance. Carbon fiber is widely used in high-performance vehicles due to its excellent lightweight properties. Parts made of carbon fiber weigh half as much as steel and one-third less than aluminum alloy. This lightweight feature also helps pure electric vehicles increase their cruising range and achieve energy-saving goals.